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Linux Prepares AMD "SRSO_USER_KERNEL_NO" Support For Zen 5 CPUs
Queued up this week via the tip/tip.git's 'x86/bugs' Git branch for the Linux kernel is AMD 'SRSO_USER_KERNEL_NO' support as a new SRSO/Inception mitigation handling seemingly for Zen 5 processors and beyond.
Queued up this week via the tip/tip.git's "x86/bugs" Git branch for the Linux kernel is AMD "SRSO_USER_KERNEL_NO" support as a new SRSO/Inception mitigation handling seemingly for Zen 5 processors and beyond. So for CPUs with SRSO_USER_KERNEL_NO, SRSO/Inception is basically not affected unless you are running virtual machines where an IBPB on VMEXIT will need to be applied for safe operation. So seemingly this SRSO_USER_KERNEL_NO is intended for Zen 5 systems and thereby taking the processors from the prior "Not affected" state for Inception/SRSO to the new "IBPB on VMEXIT only" mitigation with SRSO_USER_KERNEL_NO.
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